Leavitt Henrietta Swan

Lea·vitt

 (lē′vĭt), Henrietta Swan 1868-1921.
American astronomer who discovered over 2,400 variable stars and observed a correlation between these stars' luminosity and period that allows for the determination of interstellar and intergalactic distances.

Leav·itt

(lē′vĭt), Henrietta Swan 1868-1921.
American astronomer who discovered four novae and over 2,400 variable stars. She also developed a mathematical formula used to measure intergalactic distances.